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Short-Term Debt and Credit Facilities (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
|
Dec. 31, 2010
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Dec. 31, 2010
Secured short-term line of credit
|
Dec. 31, 2011
Unsecured short-term line of credit
|
Dec. 31, 2010
Unsecured short-term line of credit
|
Dec. 31, 2011
Unsecured short-term line of credit
Maximum
|
Dec. 31, 2010
Unsecured short-term line of credit
Maximum
|
Dec. 31, 2011
Unsecured short-term line of credit
Minimum
|
Dec. 31, 2010
Unsecured short-term line of credit
Minimum
|
Dec. 31, 2011
Local currency borrowings
|
Dec. 31, 2011
Committed short-term credit facilities (the liquidity facility)
|
Dec. 31, 2011
Committed short-term credit facilities (the liquidity facility)
Original Agreement
|
Nov. 30, 2011
Committed short-term credit facilities (the liquidity facility)
Original Agreement
|
Nov. 30, 2011
Committed short-term credit facilities (the liquidity facility)
As adjusted
|
Dec. 31, 2011
Uncommitted short-term credit line
|
Dec. 31, 2011
Local bank lines of credit
|
|
| Lines of Credit: | ||||||||||||||||
| Short-term borrowings weighted-average interest rate (as a percent) | 4.47% | 2.53% | 27.81% | |||||||||||||
| Total short-term debt | $ 719 | $ 1,718 | $ 15 | $ 719 | $ 1,703 | $ 67 | $ 73 | $ 400 | $ 246 | |||||||
| Unsecured short-term line of credit percentage rate | 29.10% | 29.10% | 0.33% | 0.33% | ||||||||||||
| Term of liquidity facility (in years) | 5 years | |||||||||||||||
| Liquidity facility maximum borrowing | 575 | 600 | ||||||||||||||
| Outstanding under uncommitted short-term credit facility | $ 527 | |||||||||||||||